Hello Jennifer!
My GGGgrandfather, Colin Ritchie, was in the 10th West India Regiment, and retired to the IOM on half pay, possibly about 1802, and died 1838, but where I don't know. I'm not sure if his family lived on the Isle prior to 1800's or not - still researching. Colin's children were born on the Isle. I obtained his army details through a researcher in the UK. Pleased to help with sources I have used.
Jeanene